Device for heating gas mixtures

ABSTRACT

A device for the intensive and regulated heating of gas mixtures in a suction tube having a carburetor located therealong, the suction tube being connected to an engine and the device comprising a bypass tube connected with the suction tube, means associated with the bypass tube to heat the gas mixture passing therethrough, and flap valve means located in the suction tube.

United States Patent [72] Inventors lngol! Ottoma- Eugen bohner 33 Plato8,, Brnnmchweig; Endreleno 'lary, 318 Graf Bernadette- Weg 1,,Wolfsburg; Eckhart Hofhnnnn, 3183 Rischfeflweg 5,, F; Hermann EilnrdRider, 318 J. F. Kennedy Ailee 78, Wolfsburg, all 01', Germany [211App]. No. 858,806

[22] Filed Sept. 17, 1969 [45] Patented Aug. 24, 1971 [32] PrioritySept. 20, 1968 [33} Germany 541 nevlcnonnnnmccssmx'wnnsGChimaJDrawingFig.

s21 U.S.C1. 165/35, es/39, 1 5 l 52 [51] Int. Cl. B6011 1/00 [50] Fieldof Search 165/35, 39, 103, 81, 52

[56] References Cited UNITED STATES PATENTS 1,931,781 10/1933 Weber165/51 Primary Examiner-Charles Sukalo Attorney-Watson, Cole, Grindle &Watson ABSTRACT: A device for the intensive and regulated heating of gasmixtures in a suction tube having a carburetor located therealong, thesuction tube being connected to an engine and the device comprising abypass tube connected with the suction tube, means associated with thebypass tube to heat the gas mixture passing therethrough, and flap valvemeans located in the suction tube.

This invention relates to a device for the intensive and regulatedheating of mixtures for internal combustion machines and engines.

By the heating of the gas mixture there is avoided, in cold engines,that the vaporized fuel mixture will again be con- 7 densed on the coldcylinder walls and thus a less concentrated gas mixture will be producedfor burning so that the efiiciency of the motor will be reduced. Inconnection with a very hot motor, however, it is not desired to providepreliminary heating of the mixture due to the then undesiredinsufficient filling. What one strives to accomplish is a regulatedmixture heating which will more or less be operative relative to thedriving conditions of the motor. Y

Various different devices are known for carrying out the heating of gasmixtures which are however distinguished essentially from the presentinvention. ln-the structure according to the present application it isan object to provide an ap paratus for heating gas mixtures for internalcombustion engines in which there is provided a flap valve in thesuction tube which in its lateral position will close connection to thecombustion space and the entire gas mixture will then be directed over asection which is provided with a heat exchanger before the mixture isdirected into the combustion space.

The advantages of the invention are contained therein, in that theposition of the flap valve is dependent upon the position of thethrottle valve by mechanical coupling with the cntrol means whereby theparticular position of the switching valve can be automatically adjustedfor heating the mixtures in order to take into consideration the drivingconditions of the motor. The thus improved mixture for the. motor willbe operative not only for idling of the motor but also under full speedand power thereof, so that there will be a distinct improvement in thecondition of the exhaust gases. By prelimina- .ry heating and by theproper operation of the flap valves, there will be a more efiicientoperation of the motor with increasing power and there will be no dangerof a knocking in the motor itself. By a better mixture of the fuel,there will result a reduced power requirement. A

Further objects of the invention will be apparent from thefollowingdescription when considered in connection with the accompanyingdrawing in which the single FIGURE is a diagrammatic view of a heaterapplied to the fuel flow from a carburetor to the engine.

Numeral 1 indicates a carburetor and behind the throttle valve 2, thereis a suction tube 3 in communication with a switch valve 4 which isoperative in such a way that when the valve 4 is closed, the mixturewill be directed througha bypass tor valve upon full power demand, thevalve 4 will be opened and thus the gas mixture will be heated. Thedrawing shows the position of the flap valves'for idling position. Whenthe en-' gine is accelerated, the flap valve 2 and later the valve 4will be opened in the direction of the arrows until the valves areparallel to the longitudinal axis of the suction tube 3 and then thepreheating of the mixture through the bypass tube 5 will be avoided. Thetube 3 is connected to an intake manifold, not shown, or directly to anengine, not shown.

We claim:

1. A device for the intensive and regulated heating of gas mixtures in asuction tube having a carburetor located therealong, said suction tubebeing connected to an engine and said device comprising a bypass tubeconnected with said suction tube, means being associated with saidbypass tube to heat the gas mixture passing therethrough, a first flapvalve being located in said suction tube between said carburetor andsaid bypass tube and a second flap valve being located in said suctiontube at the connection junction with said bypass valve, and means beingprovided to operatively interconnect said valves to operate and to setsaid valves in operative relationship to one another.

2. A device according to claim 1 wherein said interconnection meansincludes a link having means connected to said valves to adjust themrelative to one another.

3. A device according to claim 2 wherein said adjustment means for saidvalves are operative to adjust said valves by means of a connected pedalin the floor of a vehicle.

4. A device according to claim 1, in which said heating means is in theform of a tubular coil disposed about said bypass tube and acting as aheat exchanger.

5. A device according to claim 1, in which said heating means is in theform of a tubular coil disposed about said bypass tube and acting as aheat exchanger, and through which a fluid medium is forced.

6. A device according to claim 1, in which said bypass tube is soconnected with said suction tube as to form a tubular circuit for thegas mixture, and said heating means being disposed about a portion ofthe tubular circuit.

1. A device for the intensive and regulated heating of gas mixtures in asuction tube having a carburetor located therealong, said suction tubebeing connected to an engine and said device comprising a bypass tubeconnected with said suction tube, means being associated with saidbypass tube to heat the gas mixture passing therethrough, a first flapvalve being located in said suction tube between said carburetor andsaid bypass tube and a second flap valve being located in said suctiontube at the connection junction with said bypass valve, and means beingprovided to operatively interconnect said valves to operate and to setsaid valves in operative relationship to one another.
 2. A deviceaccording to claim 1 wherein said interconnection means includes a linkhaving means connected to said valves to adjust them relative to oneanother.
 3. A device according to claim 2 wherein said adjustment meansfor said valves are operative to adjust said valves by means of aconnected pedal in the floor of a vehicle.
 4. A device according toclaim 1, in which said heating means is in the form of a tubular coildisposed about said bypass tube and acting as a heat exchanger.
 5. Adevice according to claim 1, in which said heating means is in the formof a tubular coil disposed about said bypass tube and acting as a heatexchanger, and through which a fluid medium is forced.
 6. A deviceaccording to claim 1, in which said bypass tube is so connected withsaid suction tube as to form a tubular circuit for the gas mixture, andsaid heating means being disposed about a portion of the tubularcircuit.